A low temperature process for the application of three‐layer polyethylene coatings

Abstract

Purpose

The purpose of this paper is to report the investigation of a low temperature application process for three‐layer polyethylene coating (3LPE) at 185‐195°C to meet the requirement of the coating temperature for X80 longitudinally welded pipe.

Design/methodology/approach

Plant coating and laboratory tests were performed to determine the properties of 3LPE coating coated at 185‐195°C.

Findings

The properties of the 3LPE coating, which was applied by using a suitable low temperature cured epoxy powder at temperature of 185‐195°C, were nearly the same as those of a 3LPE coating that had been applied at the normal coating temperature (200‐230°C).

Originality/value

Recommended acceptance criteria for 3LPE coatings applied at 185‐195°C are proposed. The research results met the requirements for external anti‐corrosion properties for X80 longitudinally welded pipe.

Citation

Huai Qi, S., Qi Bin, Z., Wen Li, H., Bei Bei, X., Zhong Ping, X. and Gui Bai, H. (2011), "A low temperature process for the application of three‐layer polyethylene coatings", Anti-Corrosion Methods and Materials, Vol. 58 No. 6, pp. 312-314. https://doi.org/10.1108/00035591111178864